Paper-peeding mechanism



Patented Oct. 21, 1919.

INVENTOR. O\\"\ES(SP\TQ BY 0%g/f iv,

ATTORNE W1 TNESS Tm: COLLIMUIA PLANOGRAPH cm, WASHINGTONHD. c.

UNITED STATES PATENT OFFICE.

CHARLES SPIRO, OF NEW YORK, N. Y., ASSIGNOR TO GOURLAND T'YPEWRITER CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PAPER-FEEDING MECHANISM.

Specification of Letters Patent.

Patented Oct. 21, 1919.

Application filed January 13, 1919. Serial No. 270,912.

To all whom it may concern:

Be it known that I, CHARLES SPIRO, citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Paper-Feeding Mechanism, of which the following is a specification.

This invention relates to paper feeding mechanism and particularly to a construction adapted and arranged for application to a typewriting machine.

The invention has for an object to provide a novel and improved construction of mounting for a typewriter platen whereby it may be introduced and securely retained in rotatable position in its supporting bearings and rendered readily removable whenever it is desired to change the platen.

Another object of the invention is to provide an improved construction of paper table carrying a feed roller cooperating with a removable platen, and having the axis of its roller mounted to travel in an arc intercepting the body of the platen to secure the most direct and efficient frictional contact therewith at a point beneath the axis of the platen.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawing- Figure 1 is a front elevation showing the invention applied to a typewriter platen;

Fig. 2 is a vertical section on line 2-2 of Fig. 1;

Fig. 3 is an end elevation of Fig. 1;

Fig. 4 is a detail horizontal section, on line H of Fig. 2;

Fig. 5 is a detail vertical section showing the platen shaft and its bearing separated; and

Fig. 6 is a similar view on line 6-6 of Fig. 1, showing the scale arm in looking position.

Like numerals refer to like parts in the several figures of the drawing.

The numeral 10 designates the platen frame which may be of any desired construction or configuration, for. instance as from the right herein shown, comprising the opposite end risers 11 connected at their rear by the bar 12 and at their front by the bar 13. Each of these risers is provided with the curved bearing socket 14 adapted to snugly fit the bearing portions 15 of the ends of the platen shaft 16 which carries the usual platen 17. The risers 11 are also provided with an entrance slot 18 leading to the bearing socket 14 therein and of less diameter than said socket. This slot is preferably formed with straight side walls and the bearing portions 15 of the platen shaft are provided with reduced or grooved portions 19 leaving the body of the shaft at this point equal in diameter to the entrance slot. These reduced portions 19 are spaced apart a distance equal to that of the risers so as to lie in alinement therewith when the platen is introduced into its bearings through the slots. The platen and its shaft is then moved longitudinally so as to bring the bearing portions of the shaft into the sockets in the risers. The platen is thus securely retained against vertical movement but permitted free rotation in its bearings, by any desired means, such as the hand holds 28 upon the ends of the shaft 16.

In order to retain the platen shaft against horizontal or longitudinal movement means are provided to engage the shaft and comprise the scale arms 20 and 21, one of which enters the reduced portion 19 at one end of theshaft These arms are generally similar in construction and pivoted at 22 upon the risers, while their upper ends are connected by the scale 23 which is spaced above the upper surface of the platen. The arm 20 is herein shown as entering the reduced portion 19 at the right end of the shaft, while both arms and scale are held in position against vibration by means of the lock lever 24 pivoted at 25 upon the adjacent riser andhaving a hooked end 26 to engage a pzi n 27 upon the arm 20, as shown in Fig. 3.

or the purpose of exerting a constant upward pressure against the platen and forming a most eificient paper feeding device, the paper table'30 is pivotally mounted upon a bearing 31 carried by the rear bar 12 of the platen frame, and its upper end at this point is curved rearwardly as at 32 to serve as a hand hold in rocking the table upon its pivot. The forward portion 33 of the table extends beneath the axis of the platen and to the front face thereof. This portion is provided at substantially its midlength with a slot 34 and depending flange 35 at the inner wall thereof. Upon this flange the bearing roller 86 is mounted and its shaft 37 is supported by the angle frame 38 which is pivoted at 40 upon the flange centrally of its length. The axis of this roller extends parallel to and beneath the axis of the platen, while the pivot of its frame permits the oscillation of this roller in a plane at a right angle to the pivotal travel of the table. The table is firmly held in contact with the platen by any desired means, for instance a spring ell mounted to surround the table pivot 31 and bear against the table and the rear bar 12, as shown in Fig. 2.

The construction of this feed table is not claimed herein, but made the subject of a separate application.

The operation of th invention will be apparent from the foregoing description, and it will be seen that the platen may be readily introduced and locked in position by the scale arms which are disposed in spaced relation in front of the paper table and held against vibration and accidental displacement by the locking lever. This construction permits the quick removal of the platen when it is desired to change to one of a different character, or for the purpose of repair. The pressure of the feed table roller against the platen assists in supporting the same in its bearings to receive the type stroke at its front and takes up wear and lost motion. It also secures a firm frictional contact for feeding the paper at a point beneath the axis of the platen which provides an extended tapering space for introducin g the paper between the platen and table. The cooperation of the roller disposed beneath the axis of the platen permits the convenient use of a removable platen, while the holdingand feeding pressure of the roller on this platen is due to the pivoting of the table so that the axis of the roller will traverse an arc intercepting the body of the platen with its line of pressure toward the axis thereof. When it is desired to relieve this roller contact to adjust or remove the paper the upper end of the table may be drawn forward causing the roller to be withdrawn from the platen, as indicated by dotted lines in Fig. 2.

It will be seen that this invention presents a very snnple, eflicient and economically manufactured construction adapted to secure new and improved results in a paper feeding mechanism. While some of the details of the structure shown have been specifically described still the invention is not. limited thereto as changes and alterations may be made within the scope of the following claims.

What I claim is 1. I11 a typewriter, a platen frame having risers at its opposite ends provided with bearing apertures having reduced entrance openings leading thereto, a platen and its shaft adapted to be shifted longitudinally in said apertures, a portion of said shaft being formed to pass through said openings, and a cooperating locking member mounted to engage said portion when the shaft is shifted longitudinally into operative position.

2. I11 a typewriter, a platen frame having risers at its opposite ends provided with bearing apertures having reduced entrance openings leading thereto, a platen, and a 1011- gitudinal-ly shiftable platen shaft having an inserting portion formed to pass through said openings and a bearing portion at one side thereof to rest in said apertures when shifted into operative position.

3. In a typewriter, a platen frame having risers at its opposite ends provided with bearing apertures having reduced entrance openings leading thereto, a platen, a l0ngitudinally shiftable platen shaft having an inserting portion formed to pass through said openings and a bearing portion at one side thereof to rest in said apertures when shifted into operative position, and means upon the platen frame to engage said inserting portion and retain said shaft against longitudinal movement.

4. In a typewriter, a platen frame having risers at its opposite ends provided with bearing apertures, a platen having its shaft adapted to be longitudinally shifted to dispose its bearing faces in said apertures, and a cooperating locking member mounted to engage said shaft when shifted longitudinally and retain the same against longitudinal movement.

5. In a typewriter, a platen frame having risers at its opposite ends provided with hearing apertures having entrance slots of less diameter leading thereto, a platen, and a longitudinally shiftable shaft therefor having reduced portions spaced to aline with said risers and formed to pass through the slots therein.

6. In a typewriter, a platen frame having risers at its opposite ends provided with bearing apertures having entrance slots of less diameter leading thereto, a platen, a longitudinally shiftable shaft therefor having reduced portions spaced to aline with said risers and formed to pass through the slots therein, and means mounted upon one riser to enter the reduced portion of said shaft and retain it against longitudinal movement. I

. -7., In a typewriter, a platen frame having risers at its opposite ends provided with bearing apertures having entrance slots, a platen, a platen shaft seated in said apertures and having a recess at one side of its bearing portion, and means mounted upon one riser to engage said recess and retain the shaft against longitudinal movement.

8. In a typewriter, a platen frame having risers at its opposite ends provided with hearing apertures having entrance slots, a platen, a platen shaft seated in said apertures and having a recess at one side of its bearing portion, and an arm pivoted upon one riser and adapted to seat in said recess in said shaft to retain it against longitudinal movement.

9. In a typewriter, a platen frame having risers at its opposite ends provided with hearing apertures having entrance slots, a platen, a platen shaft seated in said apertures and having a circumferential groove, arms pivoted upon the opposite risers and one of which is adapted to seat in said groove, and a scale carried by the upper end of said arms above said platen.

10. In a typewriter, a platen frame having risers at its opposite ends provided with bearing apertures, a platen, a longitudinally shiftable platen shaft provided with hearing portions seated in said apertures and a reduced portion at one side thereof, a retain ing arm pivoted to seat in said reduced portion, and means for locking said retaining arm in contacting position.

11. In a typewriter, a platen frame having risers at its opposite ends provided with hearing apertures, a laten, a longitudinally shiftable platen sha t provided with bearing portions seated in said apertures and a reduced portion at one side thereof, a retaining arm pivoted upon a riser to seat in said reduced portion, and a locking hook pivoted upon said riser and engaging said arm.

12. In a typewriter, a platen frame provided with risers, a platen having a shaft pivoted therein and provided with a depressed portion at one side of its bearing portion, a scale arm pivoted at the front of one of said risers and adapted to lie in said depressed portion, and locking means pivoted upon the rear of said riser and engaging said arm above said platen shaft.

13. In a typewriter, a platen frame provided with risers, a platen having a shaft pivoted therein and provided with a de pressed portion at one side of its bearing portion, a scale arm pivoted at the front of one of said risers below said shaft and adapted to lie in said depressed portion, an angular locking lever pivoted upon the rear of said riser, and a pin upon said arm adapted to be engaged by said lever.

14. In a typewriter, a platen frame formed with risers at its opposite ends provided with hearing apertures having entrance slots of less diameter with parallel side walls, a platen, and a shaft therefor provided with hearing portions and circumferentially grooved portions at one side thereof alined to pass through said slots.

15. In a typewriter, a platen frame provided with risers, a platen having a shaft removably mounted therein, scale arms mounted upon said risers and disposed to engage and retain said shaft against longitudinal movement, and a scale connecting said arms.

In testimony whereof I aflix my signature,

CHARLES SPIRO.

copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents.

' Washington, D. 0. 

